{
	"document":{
		"aggregate_severity":{
			"namespace":"https://nvd.nist.gov/vuln-metrics/cvss",
			"text":"HIGH"
		},
		"category":"csaf_vex",
		"csaf_version":"2.0",
		"distribution":{
			"tlp":{
				"label":"WHITE",
				"url":"https:/www.first.org/tlp/"
			}
		},
		"lang":"en",
		"notes":[
			{
				"text":"In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: Fix double increment of client_count in dma_chan_get()\n\nThe first time dma_chan_get() is called for a channel the channel\nclient_count is incorrectly incremented twice for public channels,\nfirst in balance_ref_count(), and again prior to returning. This\nresults in an incorrect client count which will lead to the\nchannel resources not being freed when they should be. A simple\n test of repeated module load and unload of async_tx on a Dell\n Power Edge R7425 also shows this resulting in a kref underflow\n warning.\n\n[  124.329662] async_tx: api initialized (async)\n[  129.000627] async_tx: api initialized (async)\n[  130.047839] ------------[ cut here ]------------\n[  130.052472] refcount_t: underflow; use-after-free.\n[  130.057279] WARNING: CPU: 3 PID: 19364 at lib/refcount.c:28\nrefcount_warn_saturate+0xba/0x110\n[  130.065811] Modules linked in: async_tx(-) rfkill intel_rapl_msr\nintel_rapl_common amd64_edac edac_mce_amd ipmi_ssif kvm_amd dcdbas kvm\nmgag200 drm_shmem_helper acpi_ipmi irqbypass drm_kms_helper ipmi_si\nsyscopyarea sysfillrect rapl pcspkr ipmi_devintf sysimgblt fb_sys_fops\nk10temp i2c_piix4 ipmi_msghandler acpi_power_meter acpi_cpufreq vfat\nfat drm fuse xfs libcrc32c sd_mod t10_pi sg ahci crct10dif_pclmul\nlibahci crc32_pclmul crc32c_intel ghash_clmulni_intel igb megaraid_sas\ni40e libata i2c_algo_bit ccp sp5100_tco dca dm_mirror dm_region_hash\ndm_log dm_mod [last unloaded: async_tx]\n[  130.117361] CPU: 3 PID: 19364 Comm: modprobe Kdump: loaded Not\ntainted 5.14.0-185.el9.x86_64 #1\n[  130.126091] Hardware name: Dell Inc. PowerEdge R7425/02MJ3T, BIOS\n1.18.0 01/17/2022\n[  130.133806] RIP: 0010:refcount_warn_saturate+0xba/0x110\n[  130.139041] Code: 01 01 e8 6d bd 55 00 0f 0b e9 72 9d 8a 00 80 3d\n26 18 9c 01 00 75 85 48 c7 c7 f8 a3 03 9d c6 05 16 18 9c 01 01 e8 4a\nbd 55 00 <0f> 0b e9 4f 9d 8a 00 80 3d 01 18 9c 01 00 0f 85 5e ff ff ff\n48 c7\n[  130.157807] RSP: 0018:ffffbf98898afe68 EFLAGS: 00010286\n[  130.163036] RAX: 0000000000000000 RBX: ffff9da06028e598 RCX: 0000000000000000\n[  130.170172] RDX: ffff9daf9de26480 RSI: ffff9daf9de198a0 RDI: ffff9daf9de198a0\n[  130.177316] RBP: ffff9da7cddf3970 R08: 0000000000000000 R09: 00000000ffff7fff\n[  130.184459] R10: ffffbf98898afd00 R11: ffffffff9d9e8c28 R12: ffff9da7cddf1970\n[  130.191596] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000\n[  130.198739] FS:  00007f646435c740(0000) GS:ffff9daf9de00000(0000)\nknlGS:0000000000000000\n[  130.206832] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[  130.212586] CR2: 00007f6463b214f0 CR3: 00000008ab98c000 CR4: 00000000003506e0\n[  130.219729] Call Trace:\n[  130.222192]  <TASK>\n[  130.224305]  dma_chan_put+0x10d/0x110\n[  130.227988]  dmaengine_put+0x7a/0xa0\n[  130.231575]  __do_sys_delete_module.constprop.0+0x178/0x280\n[  130.237157]  ? syscall_trace_enter.constprop.0+0x145/0x1d0\n[  130.242652]  do_syscall_64+0x5c/0x90\n[  130.246240]  ? exc_page_fault+0x62/0x150\n[  130.250178]  entry_SYSCALL_64_after_hwframe+0x63/0xcd\n[  130.255243] RIP: 0033:0x7f6463a3f5ab\n[  130.258830] Code: 73 01 c3 48 8b 0d 75 a8 1b 00 f7 d8 64 89 01 48\n83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa b8 b0 00 00\n00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 45 a8 1b 00 f7 d8 64 89\n01 48\n[  130.277591] RSP: 002b:00007fff22f972c8 EFLAGS: 00000206 ORIG_RAX:\n00000000000000b0\n[  130.285164] RAX: ffffffffffffffda RBX: 000055b6786edd40 RCX: 00007f6463a3f5ab\n[  130.292303] RDX: 0000000000000000 RSI: 0000000000000800 RDI: 000055b6786edda8\n[  130.299443] RBP: 000055b6786edd40 R08: 0000000000000000 R09: 0000000000000000\n[  130.306584] R10: 00007f6463b9eac0 R11: 0000000000000206 R12: 000055b6786edda8\n[  130.313731] R13: 0000000000000000 R14: 000055b6786edda8 R15: 00007fff22f995f8\n[  130.320875]  </TASK>\n[  130.323081] ---[ end trace eff7156d56b5cf25 ]---\n\ncat /sys/class/dma/dma0chan*/in_use would get the wrong result.\n2\n2\n2\n\nTest-by: Jie Hai <haijie1@huawei.com>",
				"category":"general",
				"title":"Synopsis"
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			"namespace":"https://www.openeuler.org",
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			"category":"vendor"
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		"references":[
			{
				"summary":"nvd cve",
				"category":"external",
				"url":"https://nvd.nist.gov/vuln/detail/CVE-2022-49753"
			},
			{
				"summary":"CVE-2022-49753 vex file",
				"category":"self",
				"url":"https://repo.openeuler.org/security/data/csaf/cve/2022/csaf-openeuler-cve-2022-49753.json"
			},
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				"summary":"openEuler-SA-2025-1408",
				"category":"self",
				"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-1408"
			},
			{
				"summary":"CVE-2022-49753",
				"category":"self",
				"url":"https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2022-49753&packageName=kernel"
			}
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		"title":"openEuler cve CVE-2022-49753",
		"tracking":{
			"initial_release_date":"2025-04-11T21:49:13+08:00",
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					"summary":"Initial",
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				"engine":{
					"name":"openEuler CSAF Tool V1.0"
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			"current_release_date":"2025-04-11T21:49:13+08:00",
			"id":"CVE-2022-49753",
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	"vulnerabilities":[
		{
			"cve":"CVE-2022-49753",
			"notes":[
				{
					"text":"In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: Fix double increment of client_count in dma_chan_get()\n\nThe first time dma_chan_get() is called for a channel the channel\nclient_count is incorrectly incremented twice for public channels,\nfirst in balance_ref_count(), and again prior to returning. This\nresults in an incorrect client count which will lead to the\nchannel resources not being freed when they should be. A simple\n test of repeated module load and unload of async_tx on a Dell\n Power Edge R7425 also shows this resulting in a kref underflow\n warning.\n\n[  124.329662] async_tx: api initialized (async)\n[  129.000627] async_tx: api initialized (async)\n[  130.047839] ------------[ cut here ]------------\n[  130.052472] refcount_t: underflow; use-after-free.\n[  130.057279] WARNING: CPU: 3 PID: 19364 at lib/refcount.c:28\nrefcount_warn_saturate+0xba/0x110\n[  130.065811] Modules linked in: async_tx(-) rfkill intel_rapl_msr\nintel_rapl_common amd64_edac edac_mce_amd ipmi_ssif kvm_amd dcdbas kvm\nmgag200 drm_shmem_helper acpi_ipmi irqbypass drm_kms_helper ipmi_si\nsyscopyarea sysfillrect rapl pcspkr ipmi_devintf sysimgblt fb_sys_fops\nk10temp i2c_piix4 ipmi_msghandler acpi_power_meter acpi_cpufreq vfat\nfat drm fuse xfs libcrc32c sd_mod t10_pi sg ahci crct10dif_pclmul\nlibahci crc32_pclmul crc32c_intel ghash_clmulni_intel igb megaraid_sas\ni40e libata i2c_algo_bit ccp sp5100_tco dca dm_mirror dm_region_hash\ndm_log dm_mod [last unloaded: async_tx]\n[  130.117361] CPU: 3 PID: 19364 Comm: modprobe Kdump: loaded Not\ntainted 5.14.0-185.el9.x86_64 #1\n[  130.126091] Hardware name: Dell Inc. PowerEdge R7425/02MJ3T, BIOS\n1.18.0 01/17/2022\n[  130.133806] RIP: 0010:refcount_warn_saturate+0xba/0x110\n[  130.139041] Code: 01 01 e8 6d bd 55 00 0f 0b e9 72 9d 8a 00 80 3d\n26 18 9c 01 00 75 85 48 c7 c7 f8 a3 03 9d c6 05 16 18 9c 01 01 e8 4a\nbd 55 00 <0f> 0b e9 4f 9d 8a 00 80 3d 01 18 9c 01 00 0f 85 5e ff ff ff\n48 c7\n[  130.157807] RSP: 0018:ffffbf98898afe68 EFLAGS: 00010286\n[  130.163036] RAX: 0000000000000000 RBX: ffff9da06028e598 RCX: 0000000000000000\n[  130.170172] RDX: ffff9daf9de26480 RSI: ffff9daf9de198a0 RDI: ffff9daf9de198a0\n[  130.177316] RBP: ffff9da7cddf3970 R08: 0000000000000000 R09: 00000000ffff7fff\n[  130.184459] R10: ffffbf98898afd00 R11: ffffffff9d9e8c28 R12: ffff9da7cddf1970\n[  130.191596] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000\n[  130.198739] FS:  00007f646435c740(0000) GS:ffff9daf9de00000(0000)\nknlGS:0000000000000000\n[  130.206832] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[  130.212586] CR2: 00007f6463b214f0 CR3: 00000008ab98c000 CR4: 00000000003506e0\n[  130.219729] Call Trace:\n[  130.222192]  <TASK>\n[  130.224305]  dma_chan_put+0x10d/0x110\n[  130.227988]  dmaengine_put+0x7a/0xa0\n[  130.231575]  __do_sys_delete_module.constprop.0+0x178/0x280\n[  130.237157]  ? syscall_trace_enter.constprop.0+0x145/0x1d0\n[  130.242652]  do_syscall_64+0x5c/0x90\n[  130.246240]  ? exc_page_fault+0x62/0x150\n[  130.250178]  entry_SYSCALL_64_after_hwframe+0x63/0xcd\n[  130.255243] RIP: 0033:0x7f6463a3f5ab\n[  130.258830] Code: 73 01 c3 48 8b 0d 75 a8 1b 00 f7 d8 64 89 01 48\n83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa b8 b0 00 00\n00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 45 a8 1b 00 f7 d8 64 89\n01 48\n[  130.277591] RSP: 002b:00007fff22f972c8 EFLAGS: 00000206 ORIG_RAX:\n00000000000000b0\n[  130.285164] RAX: ffffffffffffffda RBX: 000055b6786edd40 RCX: 00007f6463a3f5ab\n[  130.292303] RDX: 0000000000000000 RSI: 0000000000000800 RDI: 000055b6786edda8\n[  130.299443] RBP: 000055b6786edd40 R08: 0000000000000000 R09: 0000000000000000\n[  130.306584] R10: 00007f6463b9eac0 R11: 0000000000000206 R12: 000055b6786edda8\n[  130.313731] R13: 0000000000000000 R14: 000055b6786edda8 R15: 00007fff22f995f8\n[  130.320875]  </TASK>\n[  130.323081] ---[ end trace eff7156d56b5cf25 ]---\n\ncat /sys/class/dma/dma0chan*/in_use would get the wrong result.\n2\n2\n2\n\nTest-by: Jie Hai <haijie1@huawei.com>",
					"category":"description",
					"title":"Vulnerability Description"
				}
			],
			"product_status":{
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					],
					"details":"kernel security update",
					"category":"vendor_fix",
					"url":"https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2025-1408"
				}
			],
			"scores":[
				{
					"cvss_v3":{
						"baseSeverity":"HIGH",
						"baseScore":7.8,
						"vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
						"version":"3.1"
					},
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					]
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			],
			"threats":[
				{
					"details":"High",
					"category":"impact"
				}
			],
			"title":"CVE-2022-49753"
		}
	]
}